Question 1

6)  A researcher using a 1% rather than a 5% level of significance is:

Accepted Answer

A)   More likely to make a Type I error
B)   More likely to make a Type II error
C)   Less likely to make a Type II error
D)   More likely to make both a Type I and Type II error

Question 2

9)  Suppose a friend said they could influence the fall of a coin and then proceeded to guess correctly on four consecutive tosses. We cannot accept this as a significant outcome because:

Accepted Answer

A)   The result of each toss is independent of the last result
B)   They did not formulate a null hypothesis
C)   The probability of four consecutive correct calls is greater than .05
D)   The coin could be biased

Question 3

1)  Usually a researcher would prefer a result significant with:

Accepted Answer

A)   p 
B)   p 
C)   p 
D)   p < .5 A

Question 4

2)  Which of these is a null hypothesis:

Accepted Answer

A)   There will be no difference between males and females in number of problems solved
B)   There will be a difference between males and females in number of problems solved
C)   There is no difference between males and females in number of problems solved
D)   There is a difference between males and females in number of problems solved

Question 5

5)  "Girls will have higher math scores than boys" is a:

Accepted Answer

A)   Non- directional hypothesis
B)   Directional hypothesis
C)   Non- directional prediction
D)   Directional prediction

Question 6

10)  A researcher wishes to find out whether there is a significant difference between a group of South American students and a group of African students in liking for the course they have just finished. All students will leave the country permanently just after the survey is completed. An appropriate level of significance to achieve would be:

Accepted Answer

A)   p 
B)   p 
C)   p 
D)   p < .5 A

Question 7

In a study which compares reaction times between two groups, one which has been asked to run a treadmill for 15 minutes and one not using the treadmill,
-8)  In the above reaction time study, a difference between two groups in favour of the treadmill condition where p is less than .05 would indicate:

Accepted Answer

A)   Proof that running a treadmill reduces reaction times
B)   Support for the null hypothesis
C)   Support for the proposal that running a treadmill reduces reaction times
D)   That the alternative hypothesis should be rejected C

Question 8

4)  In a normal distribution a z score of 2.55 would be:

Accepted Answer

A)   Significant with p 
B)   Significant with p 
C)   Significant with p 
D)   Significant with p < .005 one-tailed

Question 9

3)  Which of the following is correct?

Accepted Answer

A)   In a one-tailed test the direction of the difference between groups is predicted
B)   In a one-tailed test the direction of the difference between groups is not predicted
C)   In a one-tailed test the alternative hypothesis does not state the predicted direction of difference between groups
D)   In a one-tailed test the null hypothesis predicts that there will be no difference between groups

Question 10

In a study which compares reaction times between two groups, one which has been asked to run a treadmill for 15 minutes and one not using the treadmill,
-7)  effect size is:

Accepted Answer

A)   The size of the difference between the means of the two groups
B)   The estimated size of the difference between means of the populations from which the groups are drawn
C)   The estimated size of the difference between standard deviations of the populations from which the two groups are drawn
D)   The actual size of the mean of the faster group

Exam 16: Significance Testing Was It a Real Effect

6) A researcher using a 1% rather than a 5% level of significance is:

Correct Answer
verified

9) Suppose a friend said they could influence the fall of a coin and then proceeded to guess correctly on four consecutive tosses. We cannot accept this as a significant outcome because:

Correct Answer
verified

1) Usually a researcher would prefer a result significant with:

Correct Answer
verified
A

2) Which of these is a null hypothesis:

Correct Answer
verified

5) "Girls will have higher math scores than boys" is a:

Correct Answer
verified

Correct Answer
verified
A

In a study which compares reaction times between two groups, one which has been asked to run a treadmill for 15 minutes and one not using the treadmill, -8) In the above reaction time study, a difference between two groups in favour of the treadmill condition where p is less than .05 would indicate:

Correct Answer
verified
C

4) In a normal distribution a z score of 2.55 would be:

Correct Answer
verified

3) Which of the following is correct?

Correct Answer
verified

In a study which compares reaction times between two groups, one which has been asked to run a treadmill for 15 minutes and one not using the treadmill, -7) effect size is:

Correct Answer
verified

Exam 16: Significance Testing Was It a Real Effect

6) A researcher using a 1% rather than a 5% level of significance is:

Correct AnswerverifiedShow Answer

9) Suppose a friend said they could influence the fall of a coin and then proceeded to guess correctly on four consecutive tosses. We cannot accept this as a significant outcome because:

Correct AnswerverifiedShow Answer

1) Usually a researcher would prefer a result significant with:

Correct AnswerverifiedA

2) Which of these is a null hypothesis:

Correct AnswerverifiedShow Answer

5) "Girls will have higher math scores than boys" is a:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedA

Correct AnswerverifiedC

4) In a normal distribution a z score of 2.55 would be:

Correct AnswerverifiedShow Answer

3) Which of the following is correct?

Correct AnswerverifiedShow Answer

In a study which compares reaction times between two groups, one which has been asked to run a treadmill for 15 minutes and one not using the treadmill, -7) effect size is:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
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